[openib-general] Re: ipoib use of multicast module on trunk causes kernel oops on 2.6.16

[Michael S. Tsirkin]

Quoting r. Sean Hefty <mshefty at ichips.intel.com>:
> Subject: Re: ipoib use of multicast module on trunk causes kernel oops on 2.6.16
> 
> Michael S. Tsirkin wrote:
> >>It's not completely trivial to reproduce.  I tried loading and
> >>unloading ib_ipoib a few times, then I tried to load ib_ipoib and
> >>unload ib_mthca, I tried pinging in between loading and unloading, and
> >>I didn't see any crashes.
> >
> >
> >Maybe SM was down.
> 
> I've tested loading, ifconfig, unloading a substantial number of times with 
> the SM up and down, and I can't reproduce this.  I'll continue to look into 
> this, but if you can provide any more information about the test setup, it 
> would be helpful.

I'm still looking at isolating this failure.  I'd like to understand the new
code better, however.  What prevents ipoib_mcast_leave and later
ipoib_mcast_free from being called on an mcast that has an outstanding query?

We used to have a completion to signal that but it seems to be gone.

-- 
MST